1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Hardware monitoring driver for Maxim MAX34440/MAX34441
4  *
5  * Copyright (c) 2011 Ericsson AB.
6  * Copyright (c) 2012 Guenter Roeck
7  */
8 
9 #include <linux/bitops.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/err.h>
14 #include <linux/i2c.h>
15 #include "pmbus.h"
16 
17 enum chips { max34440, max34441, max34446, max34451, max34460, max34461 };
18 
19 #define MAX34440_MFR_VOUT_PEAK		0xd4
20 #define MAX34440_MFR_IOUT_PEAK		0xd5
21 #define MAX34440_MFR_TEMPERATURE_PEAK	0xd6
22 #define MAX34440_MFR_VOUT_MIN		0xd7
23 
24 #define MAX34446_MFR_POUT_PEAK		0xe0
25 #define MAX34446_MFR_POUT_AVG		0xe1
26 #define MAX34446_MFR_IOUT_AVG		0xe2
27 #define MAX34446_MFR_TEMPERATURE_AVG	0xe3
28 
29 #define MAX34440_STATUS_OC_WARN		BIT(0)
30 #define MAX34440_STATUS_OC_FAULT	BIT(1)
31 #define MAX34440_STATUS_OT_FAULT	BIT(5)
32 #define MAX34440_STATUS_OT_WARN		BIT(6)
33 
34 /*
35  * The whole max344* family have IOUT_OC_WARN_LIMIT and IOUT_OC_FAULT_LIMIT
36  * swapped from the standard pmbus spec addresses.
37  */
38 #define MAX34440_IOUT_OC_WARN_LIMIT	0x46
39 #define MAX34440_IOUT_OC_FAULT_LIMIT	0x4A
40 
41 #define MAX34451_MFR_CHANNEL_CONFIG	0xe4
42 #define MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK	0x3f
43 
44 struct max34440_data {
45 	int id;
46 	struct pmbus_driver_info info;
47 };
48 
49 #define to_max34440_data(x)  container_of(x, struct max34440_data, info)
50 
51 static const struct i2c_device_id max34440_id[];
52 
max34440_read_word_data(struct i2c_client * client,int page,int phase,int reg)53 static int max34440_read_word_data(struct i2c_client *client, int page,
54 				   int phase, int reg)
55 {
56 	int ret;
57 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
58 	const struct max34440_data *data = to_max34440_data(info);
59 
60 	switch (reg) {
61 	case PMBUS_IOUT_OC_FAULT_LIMIT:
62 		ret = pmbus_read_word_data(client, page, phase,
63 					   MAX34440_IOUT_OC_FAULT_LIMIT);
64 		break;
65 	case PMBUS_IOUT_OC_WARN_LIMIT:
66 		ret = pmbus_read_word_data(client, page, phase,
67 					   MAX34440_IOUT_OC_WARN_LIMIT);
68 		break;
69 	case PMBUS_VIRT_READ_VOUT_MIN:
70 		ret = pmbus_read_word_data(client, page, phase,
71 					   MAX34440_MFR_VOUT_MIN);
72 		break;
73 	case PMBUS_VIRT_READ_VOUT_MAX:
74 		ret = pmbus_read_word_data(client, page, phase,
75 					   MAX34440_MFR_VOUT_PEAK);
76 		break;
77 	case PMBUS_VIRT_READ_IOUT_AVG:
78 		if (data->id != max34446 && data->id != max34451)
79 			return -ENXIO;
80 		ret = pmbus_read_word_data(client, page, phase,
81 					   MAX34446_MFR_IOUT_AVG);
82 		break;
83 	case PMBUS_VIRT_READ_IOUT_MAX:
84 		ret = pmbus_read_word_data(client, page, phase,
85 					   MAX34440_MFR_IOUT_PEAK);
86 		break;
87 	case PMBUS_VIRT_READ_POUT_AVG:
88 		if (data->id != max34446)
89 			return -ENXIO;
90 		ret = pmbus_read_word_data(client, page, phase,
91 					   MAX34446_MFR_POUT_AVG);
92 		break;
93 	case PMBUS_VIRT_READ_POUT_MAX:
94 		if (data->id != max34446)
95 			return -ENXIO;
96 		ret = pmbus_read_word_data(client, page, phase,
97 					   MAX34446_MFR_POUT_PEAK);
98 		break;
99 	case PMBUS_VIRT_READ_TEMP_AVG:
100 		if (data->id != max34446 && data->id != max34460 &&
101 		    data->id != max34461)
102 			return -ENXIO;
103 		ret = pmbus_read_word_data(client, page, phase,
104 					   MAX34446_MFR_TEMPERATURE_AVG);
105 		break;
106 	case PMBUS_VIRT_READ_TEMP_MAX:
107 		ret = pmbus_read_word_data(client, page, phase,
108 					   MAX34440_MFR_TEMPERATURE_PEAK);
109 		break;
110 	case PMBUS_VIRT_RESET_POUT_HISTORY:
111 		if (data->id != max34446)
112 			return -ENXIO;
113 		ret = 0;
114 		break;
115 	case PMBUS_VIRT_RESET_VOUT_HISTORY:
116 	case PMBUS_VIRT_RESET_IOUT_HISTORY:
117 	case PMBUS_VIRT_RESET_TEMP_HISTORY:
118 		ret = 0;
119 		break;
120 	default:
121 		ret = -ENODATA;
122 		break;
123 	}
124 	return ret;
125 }
126 
max34440_write_word_data(struct i2c_client * client,int page,int reg,u16 word)127 static int max34440_write_word_data(struct i2c_client *client, int page,
128 				    int reg, u16 word)
129 {
130 	const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
131 	const struct max34440_data *data = to_max34440_data(info);
132 	int ret;
133 
134 	switch (reg) {
135 	case PMBUS_IOUT_OC_FAULT_LIMIT:
136 		ret = pmbus_write_word_data(client, page, MAX34440_IOUT_OC_FAULT_LIMIT,
137 					    word);
138 		break;
139 	case PMBUS_IOUT_OC_WARN_LIMIT:
140 		ret = pmbus_write_word_data(client, page, MAX34440_IOUT_OC_WARN_LIMIT,
141 					    word);
142 		break;
143 	case PMBUS_VIRT_RESET_POUT_HISTORY:
144 		ret = pmbus_write_word_data(client, page,
145 					    MAX34446_MFR_POUT_PEAK, 0);
146 		if (ret)
147 			break;
148 		ret = pmbus_write_word_data(client, page,
149 					    MAX34446_MFR_POUT_AVG, 0);
150 		break;
151 	case PMBUS_VIRT_RESET_VOUT_HISTORY:
152 		ret = pmbus_write_word_data(client, page,
153 					    MAX34440_MFR_VOUT_MIN, 0x7fff);
154 		if (ret)
155 			break;
156 		ret = pmbus_write_word_data(client, page,
157 					    MAX34440_MFR_VOUT_PEAK, 0);
158 		break;
159 	case PMBUS_VIRT_RESET_IOUT_HISTORY:
160 		ret = pmbus_write_word_data(client, page,
161 					    MAX34440_MFR_IOUT_PEAK, 0);
162 		if (!ret && (data->id == max34446 || data->id == max34451))
163 			ret = pmbus_write_word_data(client, page,
164 					MAX34446_MFR_IOUT_AVG, 0);
165 
166 		break;
167 	case PMBUS_VIRT_RESET_TEMP_HISTORY:
168 		ret = pmbus_write_word_data(client, page,
169 					    MAX34440_MFR_TEMPERATURE_PEAK,
170 					    0x8000);
171 		if (!ret && data->id == max34446)
172 			ret = pmbus_write_word_data(client, page,
173 					MAX34446_MFR_TEMPERATURE_AVG, 0);
174 		break;
175 	default:
176 		ret = -ENODATA;
177 		break;
178 	}
179 	return ret;
180 }
181 
max34440_read_byte_data(struct i2c_client * client,int page,int reg)182 static int max34440_read_byte_data(struct i2c_client *client, int page, int reg)
183 {
184 	int ret = 0;
185 	int mfg_status;
186 
187 	if (page >= 0) {
188 		ret = pmbus_set_page(client, page, 0xff);
189 		if (ret < 0)
190 			return ret;
191 	}
192 
193 	switch (reg) {
194 	case PMBUS_STATUS_IOUT:
195 		mfg_status = pmbus_read_word_data(client, 0, 0xff,
196 						  PMBUS_STATUS_MFR_SPECIFIC);
197 		if (mfg_status < 0)
198 			return mfg_status;
199 		if (mfg_status & MAX34440_STATUS_OC_WARN)
200 			ret |= PB_IOUT_OC_WARNING;
201 		if (mfg_status & MAX34440_STATUS_OC_FAULT)
202 			ret |= PB_IOUT_OC_FAULT;
203 		break;
204 	case PMBUS_STATUS_TEMPERATURE:
205 		mfg_status = pmbus_read_word_data(client, 0, 0xff,
206 						  PMBUS_STATUS_MFR_SPECIFIC);
207 		if (mfg_status < 0)
208 			return mfg_status;
209 		if (mfg_status & MAX34440_STATUS_OT_WARN)
210 			ret |= PB_TEMP_OT_WARNING;
211 		if (mfg_status & MAX34440_STATUS_OT_FAULT)
212 			ret |= PB_TEMP_OT_FAULT;
213 		break;
214 	default:
215 		ret = -ENODATA;
216 		break;
217 	}
218 	return ret;
219 }
220 
max34451_set_supported_funcs(struct i2c_client * client,struct max34440_data * data)221 static int max34451_set_supported_funcs(struct i2c_client *client,
222 					 struct max34440_data *data)
223 {
224 	/*
225 	 * Each of the channel 0-15 can be configured to monitor the following
226 	 * functions based on MFR_CHANNEL_CONFIG[5:0]
227 	 * 0x10: Sequencing + voltage monitoring (only valid for PAGES 0–11)
228 	 * 0x20: Voltage monitoring (no sequencing)
229 	 * 0x21: Voltage read only
230 	 * 0x22: Current monitoring
231 	 * 0x23: Current read only
232 	 * 0x30: General-purpose input active low
233 	 * 0x34: General-purpose input active high
234 	 * 0x00:  Disabled
235 	 */
236 
237 	int page, rv;
238 
239 	for (page = 0; page < 16; page++) {
240 		rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page);
241 		if (rv < 0)
242 			return rv;
243 
244 		rv = i2c_smbus_read_word_data(client,
245 					      MAX34451_MFR_CHANNEL_CONFIG);
246 		if (rv < 0)
247 			return rv;
248 
249 		switch (rv & MAX34451_MFR_CHANNEL_CONFIG_SEL_MASK) {
250 		case 0x10:
251 		case 0x20:
252 			data->info.func[page] = PMBUS_HAVE_VOUT |
253 				PMBUS_HAVE_STATUS_VOUT;
254 			break;
255 		case 0x21:
256 			data->info.func[page] = PMBUS_HAVE_VOUT;
257 			break;
258 		case 0x22:
259 			data->info.func[page] = PMBUS_HAVE_IOUT |
260 				PMBUS_HAVE_STATUS_IOUT;
261 			break;
262 		case 0x23:
263 			data->info.func[page] = PMBUS_HAVE_IOUT;
264 			break;
265 		default:
266 			break;
267 		}
268 	}
269 
270 	return 0;
271 }
272 
273 static struct pmbus_driver_info max34440_info[] = {
274 	[max34440] = {
275 		.pages = 14,
276 		.format[PSC_VOLTAGE_IN] = direct,
277 		.format[PSC_VOLTAGE_OUT] = direct,
278 		.format[PSC_TEMPERATURE] = direct,
279 		.format[PSC_CURRENT_OUT] = direct,
280 		.m[PSC_VOLTAGE_IN] = 1,
281 		.b[PSC_VOLTAGE_IN] = 0,
282 		.R[PSC_VOLTAGE_IN] = 3,	    /* R = 0 in datasheet reflects mV */
283 		.m[PSC_VOLTAGE_OUT] = 1,
284 		.b[PSC_VOLTAGE_OUT] = 0,
285 		.R[PSC_VOLTAGE_OUT] = 3,    /* R = 0 in datasheet reflects mV */
286 		.m[PSC_CURRENT_OUT] = 1,
287 		.b[PSC_CURRENT_OUT] = 0,
288 		.R[PSC_CURRENT_OUT] = 3,    /* R = 0 in datasheet reflects mA */
289 		.m[PSC_TEMPERATURE] = 1,
290 		.b[PSC_TEMPERATURE] = 0,
291 		.R[PSC_TEMPERATURE] = 2,
292 		.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
293 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
294 		.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
295 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
296 		.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
297 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
298 		.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
299 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
300 		.func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
301 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
302 		.func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
303 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
304 		.func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
305 		.func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
306 		.func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
307 		.func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
308 		.func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
309 		.func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
310 		.func[12] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
311 		.func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
312 		.read_byte_data = max34440_read_byte_data,
313 		.read_word_data = max34440_read_word_data,
314 		.write_word_data = max34440_write_word_data,
315 	},
316 	[max34441] = {
317 		.pages = 12,
318 		.format[PSC_VOLTAGE_IN] = direct,
319 		.format[PSC_VOLTAGE_OUT] = direct,
320 		.format[PSC_TEMPERATURE] = direct,
321 		.format[PSC_CURRENT_OUT] = direct,
322 		.format[PSC_FAN] = direct,
323 		.m[PSC_VOLTAGE_IN] = 1,
324 		.b[PSC_VOLTAGE_IN] = 0,
325 		.R[PSC_VOLTAGE_IN] = 3,
326 		.m[PSC_VOLTAGE_OUT] = 1,
327 		.b[PSC_VOLTAGE_OUT] = 0,
328 		.R[PSC_VOLTAGE_OUT] = 3,
329 		.m[PSC_CURRENT_OUT] = 1,
330 		.b[PSC_CURRENT_OUT] = 0,
331 		.R[PSC_CURRENT_OUT] = 3,
332 		.m[PSC_TEMPERATURE] = 1,
333 		.b[PSC_TEMPERATURE] = 0,
334 		.R[PSC_TEMPERATURE] = 2,
335 		.m[PSC_FAN] = 1,
336 		.b[PSC_FAN] = 0,
337 		.R[PSC_FAN] = 0,
338 		.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
339 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
340 		.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
341 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
342 		.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
343 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
344 		.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
345 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
346 		.func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
347 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
348 		.func[5] = PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12,
349 		.func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
350 		.func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
351 		.func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
352 		.func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
353 		.func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
354 		.func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
355 		.read_byte_data = max34440_read_byte_data,
356 		.read_word_data = max34440_read_word_data,
357 		.write_word_data = max34440_write_word_data,
358 	},
359 	[max34446] = {
360 		.pages = 7,
361 		.format[PSC_VOLTAGE_IN] = direct,
362 		.format[PSC_VOLTAGE_OUT] = direct,
363 		.format[PSC_TEMPERATURE] = direct,
364 		.format[PSC_CURRENT_OUT] = direct,
365 		.format[PSC_POWER] = direct,
366 		.m[PSC_VOLTAGE_IN] = 1,
367 		.b[PSC_VOLTAGE_IN] = 0,
368 		.R[PSC_VOLTAGE_IN] = 3,
369 		.m[PSC_VOLTAGE_OUT] = 1,
370 		.b[PSC_VOLTAGE_OUT] = 0,
371 		.R[PSC_VOLTAGE_OUT] = 3,
372 		.m[PSC_CURRENT_OUT] = 1,
373 		.b[PSC_CURRENT_OUT] = 0,
374 		.R[PSC_CURRENT_OUT] = 3,
375 		.m[PSC_POWER] = 1,
376 		.b[PSC_POWER] = 0,
377 		.R[PSC_POWER] = 3,
378 		.m[PSC_TEMPERATURE] = 1,
379 		.b[PSC_TEMPERATURE] = 0,
380 		.R[PSC_TEMPERATURE] = 2,
381 		.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
382 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
383 		.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
384 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
385 		.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
386 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT,
387 		.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
388 		  | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT,
389 		.func[4] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
390 		.func[5] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
391 		.func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
392 		.read_byte_data = max34440_read_byte_data,
393 		.read_word_data = max34440_read_word_data,
394 		.write_word_data = max34440_write_word_data,
395 	},
396 	[max34451] = {
397 		.pages = 21,
398 		.format[PSC_VOLTAGE_OUT] = direct,
399 		.format[PSC_TEMPERATURE] = direct,
400 		.format[PSC_CURRENT_OUT] = direct,
401 		.m[PSC_VOLTAGE_OUT] = 1,
402 		.b[PSC_VOLTAGE_OUT] = 0,
403 		.R[PSC_VOLTAGE_OUT] = 3,
404 		.m[PSC_CURRENT_OUT] = 1,
405 		.b[PSC_CURRENT_OUT] = 0,
406 		.R[PSC_CURRENT_OUT] = 2,
407 		.m[PSC_TEMPERATURE] = 1,
408 		.b[PSC_TEMPERATURE] = 0,
409 		.R[PSC_TEMPERATURE] = 2,
410 		/* func 0-15 is set dynamically before probing */
411 		.func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
412 		.func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
413 		.func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
414 		.func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
415 		.func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
416 		.read_word_data = max34440_read_word_data,
417 		.write_word_data = max34440_write_word_data,
418 	},
419 	[max34460] = {
420 		.pages = 18,
421 		.format[PSC_VOLTAGE_OUT] = direct,
422 		.format[PSC_TEMPERATURE] = direct,
423 		.m[PSC_VOLTAGE_OUT] = 1,
424 		.b[PSC_VOLTAGE_OUT] = 0,
425 		.R[PSC_VOLTAGE_OUT] = 3,
426 		.m[PSC_TEMPERATURE] = 1,
427 		.b[PSC_TEMPERATURE] = 0,
428 		.R[PSC_TEMPERATURE] = 2,
429 		.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
430 		.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
431 		.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
432 		.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
433 		.func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
434 		.func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
435 		.func[6] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
436 		.func[7] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
437 		.func[8] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
438 		.func[9] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
439 		.func[10] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
440 		.func[11] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
441 		.func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
442 		.func[14] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
443 		.func[15] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
444 		.func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
445 		.func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
446 		.read_word_data = max34440_read_word_data,
447 		.write_word_data = max34440_write_word_data,
448 	},
449 	[max34461] = {
450 		.pages = 23,
451 		.format[PSC_VOLTAGE_OUT] = direct,
452 		.format[PSC_TEMPERATURE] = direct,
453 		.m[PSC_VOLTAGE_OUT] = 1,
454 		.b[PSC_VOLTAGE_OUT] = 0,
455 		.R[PSC_VOLTAGE_OUT] = 3,
456 		.m[PSC_TEMPERATURE] = 1,
457 		.b[PSC_TEMPERATURE] = 0,
458 		.R[PSC_TEMPERATURE] = 2,
459 		.func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
460 		.func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
461 		.func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
462 		.func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
463 		.func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
464 		.func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
465 		.func[6] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
466 		.func[7] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
467 		.func[8] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
468 		.func[9] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
469 		.func[10] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
470 		.func[11] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
471 		.func[12] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
472 		.func[13] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
473 		.func[14] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
474 		.func[15] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
475 		/* page 16 is reserved */
476 		.func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
477 		.func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
478 		.func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
479 		.func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
480 		.func[21] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
481 		.read_word_data = max34440_read_word_data,
482 		.write_word_data = max34440_write_word_data,
483 	},
484 };
485 
max34440_probe(struct i2c_client * client)486 static int max34440_probe(struct i2c_client *client)
487 {
488 	struct max34440_data *data;
489 	int rv;
490 
491 	data = devm_kzalloc(&client->dev, sizeof(struct max34440_data),
492 			    GFP_KERNEL);
493 	if (!data)
494 		return -ENOMEM;
495 	data->id = i2c_match_id(max34440_id, client)->driver_data;
496 	data->info = max34440_info[data->id];
497 
498 	if (data->id == max34451) {
499 		rv = max34451_set_supported_funcs(client, data);
500 		if (rv)
501 			return rv;
502 	}
503 
504 	return pmbus_do_probe(client, &data->info);
505 }
506 
507 static const struct i2c_device_id max34440_id[] = {
508 	{"max34440", max34440},
509 	{"max34441", max34441},
510 	{"max34446", max34446},
511 	{"max34451", max34451},
512 	{"max34460", max34460},
513 	{"max34461", max34461},
514 	{}
515 };
516 MODULE_DEVICE_TABLE(i2c, max34440_id);
517 
518 /* This is the driver that will be inserted */
519 static struct i2c_driver max34440_driver = {
520 	.driver = {
521 		   .name = "max34440",
522 		   },
523 	.probe_new = max34440_probe,
524 	.id_table = max34440_id,
525 };
526 
527 module_i2c_driver(max34440_driver);
528 
529 MODULE_AUTHOR("Guenter Roeck");
530 MODULE_DESCRIPTION("PMBus driver for Maxim MAX34440/MAX34441");
531 MODULE_LICENSE("GPL");
532 MODULE_IMPORT_NS(PMBUS);
533